Geyser manufacturer Ariston and insurance company lack of ethics

My geyser burst. The date on the Ariston geyser is 2021. Insurance came out and said that the geyser is under warranty. They eventually sent a ticket to Ariston 2 days later. Ariston have sent their plumbers today and I have been told that the geyser warranty on a replaced insurance claim is based on the initial geyser that was in before the replacement geyser was put in! Not based on the new geyser that was put in as a replacement. So in other words the "new" geyser that was put in can be 1 month old but if the previous geyser was near the end of the warranty the geyser won't be replaced as a warranty claim as the 1 month old geyser is now over the 5 year warranty period!!!! This is a serious **** with the insurance companies and the geyser manufacturers! The manufacturer plumbers remove the plate that should be on the geyser, so that the client has no comeback on them for the proper warranty on the replaced geyser. The customer is certainly NOT being looked after, but the manufacturer and insurance companies. It is a very *****ed system. On top of it this is now the 3rd day of waiting, and the process needs to go back to the beginning again, to the insurance company who referred me to the manufacturer. A seriously *****ed system! How ethical are the insurance companies and manufacturers?